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BlogsAsk The Experts ForumHave There Been Any Improvements for the Readability of NFC Chips Stacked One on Top of the Other?

Have There Been Any Improvements for the Readability of NFC Chips Stacked One on Top of the Other?

Posted By RFID Journal, 11.27.2018

For instance, has there been any experimentation with using metal-dielectric composite materials for insulating the antennas?

—Amber

———

Amber,

I have not seen any advances in Near Field Communication (NFC) transponders that would allow tags to be read even when stacked one on top of another. I do not think insulating the antennas would work, as the issue is one antenna blocking energy from reaching the one below it. Insulation would only help to mitigate the effects of detuning when two antennas touch.

SATO Global Solutions acquired a company called Magellan Technology in 2013. Magellan had developed a technique called phased jitter modulation (PJM), which enabled HF tags to be read, even when tags were stacked one on top of another. I don't think anyone is producing NFC transponders with PJM technology. If any of our readers are aware of either NFC transponders that use PJM or some other innovation that would enable tags to be read when closely stacked, they are invited to post information below.

—Mark Roberti, Founder and Editor, RFID Journal

USER COMMENTS

Johannes Grüll 2018-12-12 08:41:29 AM
Hi Mark, there is a dedicated IC called ICODE ILT which NXP Semiconductors specifically designed for stacking applications. It is widely used in stacking applications like Casinos, document tracking and stacked Card applications. You can find first info's here https://www.nxp.com/products/identification-and-security/smart-label-and-tag-ics/icode/icode-ilt:SL2S1402_SL2S1502_SL2S1602 or just contact me here on my profile, happy to Support!

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